8/17/2010 @ 3:00PM

In Pictures: Best-Ever Social Media Campaigns

18. BMW: “1 Series Graffiti Contest”

In honor of BMW’s “1 Series,” in 2008 the German carmaker created an online graffiti contest whereparticipants answered the question “What drives you?” through designs on the outline of the car. Participants submitted about 9,000 drawings, which garnered about 500,000 total votes. The winners received car models rather than actual vehicles.